____ is the separation of material in a newly formed planet or asteroid according to density. This happens when the object becomes molten
a. Accretion
b. Differentiation
c. Condensation
d. Outgassing
e. Sublimation
B
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When the number of turns in a solenoid and its length are both doubled, the ratio of the magnitude of the new magnetic field inside to the magnitude of the original magnetic field inside is what?
a. 0.25 b. 0.50 c. 1 d. 2 e. 4
Thin Films: A soap bubble has an index of refraction of 1.33. What minimum thickness of this bubble will ensure maximum reflectance of normally-incident light having a wavelength of 530 nm?
A. 24.9 nm B. 76.9 nm C. 99.6 nm D. 199 nm E. 398 nm
How are the circumference, C, of the ground-state orbit of the electron in hydrogen and the de Broglie wavelength, +, related?
a. 
b. 
c. 
d. 
e. 
The Solar System is located about 8 light-years away from the Galactic center.
Answer the following statement true (T) or false (F)